Walk down Brighton Beach Avenue and count the languages on the signs. Russian, Georgian, Ukrainian, Spanish, English, sometimes on one storefront. The signs learned this decades ago. Websites still haven't.
The math
Nearly half of New York City households speak a language other than English at home. When someone searches in Russian and your site only answers in English, you don't look less convenient, you look like you're not for them.
What multilingual actually does
It's not translation for decoration. A customer who reads your prices, your services, and your story in their own language trusts you before they ever call. And Google shows your pages to people searching in those languages, which your English-only competitors will never see.
Why we build five by default
Every site we ship speaks English, Spanish, Georgian, Russian, and Ukrainian. Not because it's trendy, but because we're from this neighborhood and we know who lives here.